The sensitivity and specificity of dysphagia evaluation with the Chinese version of the volume and viscosity swallowing test / 中华物理医学与康复杂志

ABSTRACT

Objective@#To explore the sensitivity and specificity of the Chinese version of the volume and viscosity swallowing test with modified safety and effectiveness indicators (VVST-CV) in assessing deglutition disorders.@*Methods@#The solvent, volume, viscosity, and test index of the volume and viscosity swallowing test were modified before it was used to evaluate 89 patients with swallowing disorders. The positive rates of the safety indexes (coughing, voice changes and blood oxygen saturation decline at least 3%) and the efficiency indexes (poor lip closure, oral residue, pharynx residue and swallowing) were recorded and compared and compared with the positive rates of penetration, aspiration and food residue determined by means of according to the videofluoroscopic swallowing study, then the sensitivity, specificity, positive predictive value and negative predictive value of the modified VVST-CV with regard to the safety and efficiency of swallowing were calculated.@*Results@#The VVST-CV′s sensitivity in detecting dysphagia was 0.97. For impaired safety it was 0.85 and for impaired swallowing efficiency it was 0.95. The sensitivity of the coughing index was 0.65, that of sound change was 0.60 and that of oxygen saturation decrease was 0.42. The positive predictive values for coughing, sound change and oxygen saturation decrease were 0.98, 0.94 and 0.94, respectively.@*Conclusion@#The VVST-CV is simple, feasible and sensitive. It can be widely useful in the evaluation of dysphagia in clinical practice.